CN215219403U

CN215219403U - Projection device, projection lens assembly and projection system

Info

Publication number: CN215219403U
Application number: CN202120770046.7U
Authority: CN
Inventors: 徐舟
Original assignee: Shenzhen Haiyi Zhixin Technology Co Ltd
Current assignee: Shenzhen Haiyi Zhixin Technology Co Ltd
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-12-17
Anticipated expiration: 2031-04-14

Abstract

The utility model relates to a projection equipment technical field discloses a projection arrangement, projection lens subassembly and projection system. The projection apparatus includes a display device having a display surface, the display surface being a curved surface, wherein a curvature of the display surface matches a curvature of a projection surface of a projection screen; the projection device also comprises a projection lens assembly, wherein the light incident surface of the projection lens assembly is a plane and/or an arc surface protruding towards the display surface, and light beams output by the display surface enter the projection lens assembly from the light incident surface and then are projected to the projection surface through the projection lens assembly. In this way, the utility model discloses can improve the projection effect.

Description

Projection device, projection lens assembly and projection system

Technical Field

The utility model relates to a projection equipment technical field especially relates to a projection arrangement, projection lens subassembly and projection system.

Background

Currently, projection apparatuses on the market generally employ a flat display device as an image source. If the projection equipment is used with a curved projection screen, the middle and two sides of the image projected on the curved projection screen form focusing deviation due to the aberration existing in the design of the projection lens when the flat display device projects the image on the curved projection screen through the projection lens, which means that the middle and two sides of the image on the curved projection screen cannot be clearly imaged at the same time, and the projection effect is poor, so that the impression of a user is greatly reduced.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a projection apparatus, a projection lens assembly and a projection system, which can improve the projection effect.

In order to solve the technical problem, the utility model discloses a technical scheme be: a projection apparatus is provided. The projection apparatus includes a display device having a display surface, the display surface being a curved surface, wherein a curvature of the display surface matches a curvature of a projection surface of a projection screen; the projection device also comprises a projection lens assembly, wherein the light incident surface of the projection lens assembly is a plane and/or an arc surface protruding towards the display surface, and light beams output by the display surface enter the projection lens assembly from the light incident surface and then are projected to the projection surface through the projection lens assembly.

In an embodiment of the present invention, the display device includes a first display device, a second display device, and a third display device, and the first display device, the second display device, and the third display device are capable of outputting images of different colors, respectively; the projection lens assembly comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a sixth lens, a seventh lens, a fourth lens, a seventh lens, a fourth lens, a seventh lens, a fourth lens, a fourth lens, a fourth lens, a.

In an embodiment of the present invention, a first film layer is disposed between the first lens and the second lens and on a surface of the third lens away from the second lens, the first film layer can reflect the light beam output by the first display device and can transmit the light beam output by the second display device and the light beam output by the third display device; and a second film layer is arranged between the second lens and the third lens and on the surface of the first lens, which is deviated from the second lens, and the second film layer can reflect the light beams output by the third display device and can transmit the light beams output by the first display device and the second display device.

In an embodiment of the present invention, the curvature of the display surface of the first display device, the curvature of the display surface of the second display device, and the curvature of the display surface of the third display device are equal.

In an embodiment of the present invention, the second side surface of the first lens is a curved surface protruding toward the first display device; the second side surface of the second lens is a curved surface protruding towards the second display device; the second side surface of the third lens is a curved surface convex to the third display device.

In an embodiment of the present invention, a curvature of the second side surface of the first lens is equal to a curvature of the display surface of the first display device; a curvature of the second side of the second lens is equal to a curvature of the display surface of the second display device; the curvature of the second side of the third lens is equal to the curvature of the display surface of the third display device.

In an embodiment of the present invention, the light incident surface of the first lens to the third lens is a plane.

In an embodiment of the present invention, the first display device and the first lens are spaced from each other, the second display device and the second lens are spaced from each other, and the third display device and the third lens are spaced from each other to form the adjustment gap.

In an embodiment of the present invention, the projection lens assembly further includes a light modulation lens set, the first lens to the third lens and the light modulation lens set are sequentially arranged along the circumferential direction, and the light beam incident to the first lens to the third lens is emitted from the light modulation lens set.

In an embodiment of the present invention, the light adjusting lens set includes a plurality of light adjusting lenses, the plurality of light adjusting lenses are sequentially arranged along the light beam propagation direction, or the light adjusting lens set includes a cambered mirror, and the cambered mirror protrudes towards the light beam propagation direction.

In order to solve the above technical problem, the utility model discloses a still another technical scheme be: providing a projection lens assembly applied to the projection device as set forth in the above embodiments; the projection lens assembly comprises a color combination lens group and a dimming lens group, light beams integrated by the color combination lens group are incident to the dimming lens group and then are emitted out through the dimming lens group.

In order to solve the above technical problem, the utility model discloses a still another technical scheme be: a projection system is provided. The projection system includes the projection device and the projection screen as set forth in the above embodiments, the projection screen has a projection surface, and the light beam output by the display device of the projection device is projected to the projection surface through the projection lens assembly.

The utility model has the advantages that: be different from prior art, the utility model provides a projection arrangement, projection lens subassembly and projection system. The display surface of the display device of the projection device is a curved surface, namely, a clear image projected by the display device through the projection lens assembly is a curved surface image. And when the projection surface of the projection screen is also a curved surface, the curvature of the display surface is matched with the curvature of the projection surface, so that the curvature of the clear image projected by the display device is matched with the curvature of the projection surface, and the clear image projected by the display device can be displayed on the projection surface as completely as possible. That is to say, the centre and the both sides of plane of projection can clearly focus simultaneously, and the centre and the both sides homoenergetic of the image of throwing on the plane of projection can clearly image, and the image of throwing on the plane of projection is comparatively clear and whole definition is comparatively unanimous promptly, can improve the projection effect, is favorable to improving user's impression.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. Moreover, the drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.

FIG. 1 is a schematic diagram of an embodiment of a prior art curved projection display system;

fig. 2 is a schematic structural diagram of an embodiment of a projection apparatus according to the present invention;

FIG. 3 is a schematic diagram of a projection system according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an embodiment of a display device and a color combining lens assembly according to the present invention;

fig. 5 is a schematic structural diagram of an embodiment of the prism of the present invention;

FIG. 6 is a schematic diagram of another viewing angle of the color combining lens assembly shown in FIG. 4;

FIG. 7 is a schematic optical path diagram of the display device and color combining lens assembly shown in FIG. 4;

fig. 8 is a schematic structural diagram of an embodiment of a first display device and a first lens according to the present invention;

fig. 9 is a schematic structural diagram of another embodiment of the first display device and the first lens of the present invention;

fig. 10 is a schematic structural diagram of another embodiment of the projection apparatus of the present invention;

fig. 11 is a schematic structural diagram of an embodiment of the projection lens assembly of the present invention;

fig. 12 is a schematic structural diagram of another embodiment of the projection system of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

For solving the relatively poor technical problem of its definition uniformity of image that projection equipment throws on curved surface projection screen among the prior art, an embodiment of the utility model provides a projection arrangement. The projection apparatus includes a display device having a display surface, the display surface being a curved surface, wherein a curvature of the display surface matches a curvature of a projection surface of a projection screen; the projection device also comprises a projection lens assembly, wherein the light incident surface of the projection lens assembly is a plane and/or an arc surface protruding towards the display surface, and light beams output by the display surface enter the projection lens assembly from the light incident surface and then are projected to the projection surface through the projection lens assembly. As described in detail below.

With the introduction of curved-surface televisions, curved-surface display systems have been widely pursued in recent years. This has the advantage of giving the viewer an immersive and enveloping feel in the case of large-size, close-range viewing. However, due to the size limitation of the curved-surface television, the size of most of the current televisions is below 85 inches, and most of the curved-surface televisions are concentrated on 55 inches, so that the size of the current curved-surface television is small and cannot provide sufficient immersion and enclosure feeling for the audience, and the heat of the curved-surface television is downward. The large-size curved surface projection display system applied to entertainment occasions such as a large-size cinema or a playground and the like can truly provide an immersive sense for a viewer, and the curved surface projection display system is a curved surface display system with better experience at present. The curved surface display system will still be a better differential display scheme under the trend of continuously increasing screen size.

For the curved projection display system, the projection device usually employs a flat display device, and it is well known that the clear image projected by the flat display device through the projection lens is also a flat image. As shown in fig. 1, a clear image a projected by the flat display device 11 through the projection lens 12 is a flat image. Due to the design of the projection lens, aberration exists, and focusing deviation is formed in the middle and two sides of the image projected on the curved projection screen, which means that the middle and two sides of the image on the curved projection screen cannot be clearly imaged at the same time. With continued reference to fig. 1, the actual image B projected on the curved projection screen 13 by the flat panel display device 11 is a curved image, wherein the middle of the actual image B can be clearly imaged, and the two sides cannot be clearly imaged. That is to say, the planar display device carried by the current curved surface projection display system can cause the consistency of the definition of projection imaging to be poor, and the appearance of a user is adversely affected.

In view of this, an embodiment of the utility model provides a projection device can improve the definition uniformity of projection formation of image, can improve the projection effect promptly, and then is favorable to improving user's impression and experiences.

Referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of a projection apparatus of the present invention.

In one embodiment, the projection apparatus 20 includes a display device 21 and a projection lens assembly, and the display device 21 and the projection lens assembly are disposed opposite to each other. The display device 21 has a display surface 23, the display surface 23 being capable of emitting light and forming an image. The projection lens assembly is used for projecting the image output by the display surface 23 onto the projection surface of the projection screen, and the optical performance, the light efficiency and the like of the whole projection device 20 can be improved through the reasonable design of the projection lens assembly.

The Display device 21 may employ Display technologies such as LCD (Liquid Crystal Display), LCOS (Liquid Crystal on Silicon), DLP (Digital Light Processing), OLED (Organic Light-Emitting Diode), MEMS (Micro-Electro-Mechanical System), Micro-LED (Micro-Light Emitting Diode), and the like. The display device 21 determines the main parameters of brightness, contrast, resolution, and color gamut of the entire projection apparatus 20. The display technologies such as LCD, LCOS, DLP, MEMS and the like are mainly applied to a flat panel display, and OLED and Micro-LED can be designed into flexible devices to realize curved surface display. The Micro-LED display technology has high brightness which can reach hundreds of thousands of nits or higher, can be designed with higher pixel density, the size of a semiconductor light emitting diode can be reduced to micron level, PPI (Pixel Per Inc) can be larger than 5000, the contrast can reach more than 100000:1, and in addition, the Micro-LED display technology has wide color gamut, high response speed, can work at the temperature of-70-100 ℃ and has long service life. Thus, as an example, the display device 21 employs Micro-LED display technology.

Of course, in other embodiments of the present invention, the display device 21 may employ other display technologies besides Micro-LED display technology, such as LCD, LCOS, DLP, MEMS, etc., as mentioned above. The display device 21 may have flexibility, and the display surface 23 on the display device 21 may be curved by the bending operation of the display device 21 itself, or the display device 21 may not have flexibility and the display surface 23 on the display device may be directly designed to be curved.

Referring to fig. 3, fig. 3 is a schematic structural diagram of an embodiment of a projection system of the present invention.

The projection device 20 can be applied to the curved projection display system, i.e. the projection screen 30 has a projection surface 31, and the projection surface 31 is a curved surface. Further, the projection surface 31 is recessed toward the incident light. In other words, the projection surface 31 is concave along the propagation direction of the light beam it receives. To match the curved imaging requirements of the projection surface 31, the display surface 23 of the display device 21 of the present embodiment is also curved. Since the clear image C projected by the projection lens assembly through the curved display surface 23 is a curved image, the clear image C projected by the display device 21 can be displayed as completely as possible on the projection surface 31 which is also a curved surface, as shown in fig. 3. That is to say, the middle and both sides of the projection surface 31 can focus clearly as far as possible simultaneously, and the middle and both sides of the image projected on the projection surface 31 can image clearly as far as possible, that is, the image projected on the projection surface 31 is clear and the overall definition is consistent, so that the phenomenon of defocusing or virtual focusing can be avoided as far as possible, the projection effect can be improved, and the user's impression can be improved.

Further, the fact that the curvature of the display surface 23 matches the curvature of the projection surface 31 means that the curvature of the display surface 23 and the curvature of the projection surface 31 are the same or close to each other. In this way, the curvature of the clear image C projected by the display device 21 is matched with the curvature of the projection surface 31, and it is further ensured that the clear image C projected by the display device 21 is completely displayed on the projection surface 31, as shown in fig. 3, so as to further ensure that the middle and both sides of the projection surface 31 can be clearly focused at the same time, and further ensure that the middle and both sides of the image projected on the projection surface 31 can be clearly imaged as much as possible, and further ensure that the consistency of the definition of the image projected on the projection surface 31 is further improved, the projection effect can be further improved, and further benefit for improving the impression of a user.

Referring to fig. 2 and 4, fig. 4 is a schematic structural diagram of an embodiment of a display device and a color combining lens assembly according to the present invention.

In an embodiment, the display device 21 includes a first display device 211, a second display device 212, and a third display device 213, and the first display device 211, the second display device 212, and the third display device 213 are respectively capable of outputting light beams of different colors. The projection lens assembly includes a color combination lens group 24, and the color combination lens group 24 is used for integrating light beams output by the first display device 211, the second display device 212 and the third display device 213 and projecting the light beams to a projection screen.

Alternatively, the first display device 211, the second display device 212, and the third display device 213 can output three primary color light beams. For example, the first display device 211 can output a red light beam, the second display device 212 can output a green light beam, and the third display device 213 can output a blue light beam. The light beams output by the first display device 211, the second display device 212 and the third display device 213 are integrated by the color combination lens assembly 24.

It should be noted that the images output by the first display device 211, the second display device 212, and the third display device 213 differ only in color, and the contents of the images output by the three devices are identical.

Of course, in other embodiments of the present invention, the first display device 211, the second display device 212, and the third display device 213 are not limited to outputting only three primary color images, and the colors of the images output by the first display device 211, the second display device 212, and the third display device 213 can form an image satisfying the requirement after being integrated by the color combination lens assembly 24, which is not limited herein.

In view of the design that the display surface 23 of the display device 21 in the above embodiment is a curved surface, the display surface 231 of the first display device 211, the display surface 232 of the second display device 212, and the display surface 233 of the third display device 213 in this embodiment all face the color combination lens group 24, so that the light beams output by the three

display devices

211, 212, and 213 can be projected to the projection lens assembly through the color combination lens group 24. Moreover, the display surface 231 of the first display device 211, the display surface 232 of the second display device 212, and the display surface 233 of the third display device 213 are all recessed in a direction away from the color combination lens group 24.

Further, the curvature of the display surface 231 of the first display device 211, the curvature of the display surface 232 of the second display device 212, and the curvature of the display surface 233 of the third display device 213 are equal. Therefore, it is beneficial to ensure that the light beams output by the first display device 211, the second display device 212, and the third display device 213 are integrated by the color combining lens assembly 24 to have good consistency, which is further beneficial to improving the projection effect.

Referring to fig. 2, fig. 4 and fig. 5, fig. 5 is a schematic structural diagram of an embodiment of the prism according to the present invention.

In one embodiment, the color combination lens group 24 includes a first lens 241, a second lens 242, and a third lens 243. The first lens 241, the second lens 242, and the third lens 243 are all prisms 40. The side surfaces of the prism 40 include a first side surface 42, an incident surface 43, and a second side surface 44, which are connected in sequence, where the edges of the first side surface 42 and the second side surface 44, which are far away from the incident surface 43, are connected, where the edge where the first side surface 42 and the second side surface 44 are connected is a common edge of the two, and the common edge is a target edge 41, as shown in fig. 5.

As shown in fig. 4, the first lens 241, the second lens 242, and the third lens 243 are sequentially arranged in a circumferential direction (as indicated by a dotted arrow in fig. 4, the same applies below). The target edge 411 of the first lens 241, the target edge 412 of the second lens 242, and the target edge 413 of the third lens 243 are brought into contact with each other, so that the target edge 411 of the first lens 241, the target edge 412 of the second lens 242, and the target edge 413 of the third lens 243 overlap each other. For example, in the case where the first side surface and the second side surface of the prism are sequentially arranged along the circumferential direction, the second side surface 441 of the first lens 241 and the first side surface 422 of the second lens 242 are close to each other, and the second side surface 442 of the second lens 242 and the first side surface 423 of the third lens 243 are close to each other.

Further, the heights of the first lens 241, the second lens 242, and the third lens 243 are the same, the top surfaces of the first lens 241, the second lens 242, and the third lens 243 are in the same plane, and the bottom surfaces of the first lens 241, the second lens 242, and the third lens 243 are also in the same plane, as shown in fig. 6. The top view angle of the color combining lens group shown in fig. 6 is shown in fig. 4.

Referring to fig. 4, the first lens element 241 to the third lens element 243 have a light incident surface, and the light incident surfaces of the first lens element 241 to the third lens element 243 are respectively disposed corresponding to the display surfaces of the first display device 211 to the third display device 213.

Specifically, the display surface 231 of the first display device 211 faces the light incident surface 431 of the first lens 241, so that the light beam output by the first display device 211 enters the first lens 241 through the light incident surface 431 of the first lens 241; the display surface 232 of the second display device 212 faces the light incident surface 432 of the second lens 242, so that the light beam output by the second display device 212 enters the second lens 242 through the light incident surface 432 of the second lens 242; the display surface 233 of the third display device 213 faces the light incident surface 433 of the third lens 243, so that the light beam output by the third display device 213 enters the third lens 243 through the light incident surface 433 of the third lens 243.

A first film layer 245 is arranged between the first lens 241 and the second lens 242 and on the surface of the third lens 243 away from the second lens 242, the first film layer 245 can reflect the light beam output by the first display device 211 and can transmit the light beam output by the second display device 212 and the third display device 213, so that the light beam output by the first display device 211 is incident on the first lens 241, is reflected by the first film layer 245, is transmitted to the side of the first lens 241 and the side of the third lens 243 away from the second lens 242, and is emitted from the side of the first lens 241 and the side of the third lens 243 away from the second lens 242, as shown in fig. 7; after the light beam output by the second display device 212 enters the second lens 242, the light beam passes through the first film 245 and exits from the side of the first lens 241 and the third lens 243 away from the second lens 242, as shown in fig. 7.

A second film layer 246 is arranged between the second lens 242 and the third lens 243 and on the surface of the first lens 241 facing away from the second lens 242, the second film layer 246 can reflect the light beam output by the third display device 213 and can transmit the light beam output by the first display device 211 and the second display device 212, so that the light beam output by the third display device 213 is incident on the third lens 243, is reflected by the second film layer 246, is transmitted to the side of the first lens 241 and the third lens 243 facing away from the second lens 242, and is emitted from the side of the first lens 241 and the third lens 243 facing away from the second lens 242, as shown in fig. 7; the light beam output by the second display device 212 enters the second lens 242, passes through the second lens 242, and passes through the second film 246 to exit from the side of the first lens 241 and the third lens 243 away from the second lens 242, as shown in fig. 7.

With continued reference to FIG. 7, the reason why the first layer 245 transmits the light beam output by the third display device 213 is: first, in order to allow the light beams output by the third display device 213 to pass through the first film layer 245 to reach the second film layer 246, specifically, to allow the light beams output by the third display device 213 to pass through the first film layer 245 on the surface of the third lens 243 facing away from the second lens 242; second, the light beams output by the third display device 213 can pass through the first film layer 245 after being reflected by the second film layer 246, reach the side of the first lens 241 and the third lens 243 away from the second lens 242, and exit, and specifically, the light beams output by the third display device 213 can pass through the first film layer 245 on the surface of the third lens 243 away from the second lens 242 after being reflected by the second film layer 246 between the second lens 242 and the third lens 243.

The reason why the second film layer 246 transmits the light beam output from the first display device 211 is that: first, in order to allow the light beam output by the first display device 211 to pass through the second film layer 246 to reach the first film layer 245, specifically, to allow the light beam output by the first display device 211 to pass through the second film layer 246 on the surface of the first lens 241 facing away from the second lens 242; second, the light beams output by the first display device 211 can pass through the second film layer 246 after being reflected by the first film layer 245 and reach the sides of the first lens 241 and the third lens 243 away from the second lens 242 and exit, and specifically, the light beams output by the first display device 211 can pass through the second film layer 246 on the surface of the first lens 241 away from the second lens 242 after being reflected by the first film layer 245 between the first lens 241 and the second lens 242.

In this way, the light output by the first display device 211, the second display device 212, and the third display device 213 is incident on the first lens 241, the second lens 242, and the third lens 243, and then passes through the first lens 241 to the third lens 243, and is converged at a side of the first lens 241 and the third lens 243 away from the second lens 242, so that the light output by the first display device 211, the second display device 212, and the third display device 213 are integrated together and projected onto the projection screen.

Based on the above-described example in which the first display device 211 can output a light beam of red, the second display device 212 can output a light beam of green, and the third display device 213 can output a light beam of blue, the first film layer 245 can reflect red light and can allow green and blue light to pass therethrough, and the second film layer 246 can reflect blue light and can allow red and green light to pass therethrough.

Alternatively, the first film layer 245 may be a red light reflecting film capable of reflecting red light and allowing green light and blue light to pass through; the second film layer 246 may be a blue light reflecting film capable of reflecting blue light and allowing red and green light to pass through. As for the specific material composition of the red light reflection film and the blue light reflection film, which belongs to the understanding of the person skilled in the art, the detailed description thereof is omitted.

Please continue to refer to fig. 4. In an embodiment, the light incident surface 431 of the first lens 241 is a curved surface protruding toward the first display device 211, so that the light incident surface 431 of the first lens 241 matches the curvature of the display surface 231 of the first display device 211 as much as possible.

The curvature of the light incident surface 431 of the first lens 241 matches the curvature of the display surface 231 of the first display device 211, meaning that the curvature of the light incident surface 431 of the first lens 241 is the same as or close to the curvature of the display surface 231 of the first display device 211. For example, as shown in fig. 8, the curvature of the light incident surface 431 of the first lens 241 is the same as the curvature of the display surface 231 of the first display device 211, and when the light beams output from various positions on the display surface 231 of the first display device 211 are transmitted to the light incident surface 431 of the first lens 241, the light beams output from the display surface 231 are incident into the first lens 241 perpendicular to the tangent plane P of the position of the incident point O on the light incident surface 431 (i.e., the light beams output from the display surface 231 propagate along the theoretical light path), so as to avoid the light beams from being reflected and refracted when entering the first lens 241 as much as possible, thereby avoiding the light quantity loss of the light beams and avoiding the actual light path of the light beams from deviating from the theoretical light path, which is beneficial to improving the projection effect.

Similarly, the light incident surface 432 of the second lens 242 is a curved surface protruding toward the second display device 212, so that the light incident surface 432 of the second lens 242 matches the curvature of the display surface 232 of the second display device 212 as much as possible, and the light beam output by the second display device 212 is prevented from being reflected and refracted when entering the second lens 242 as much as possible, which is further beneficial to improving the projection effect.

Similarly, the light incident surface 433 of the third lens 243 is a curved surface protruding toward the third display device 213, so that the light incident surface 433 of the third lens 243 matches the curvature of the display surface 233 of the third display device 213 as much as possible, and the light beam output by the third display device 213 is prevented from being reflected and refracted when entering the third lens 243 as much as possible, which is further beneficial to improving the projection effect.

Further, the curvature of the light incident surface 431 of the first lens 241 is equal to the curvature of the display surface 231 of the first display device 211. Therefore, the light beam output by the first display device 211 can be ensured to be incident on the first lens 241 along the normal to the maximum extent, and the light beam output by the first display device 211 is prevented from being reflected and refracted when entering the first lens 241 to the maximum extent, which is further beneficial to improving the projection effect.

The curvature of the light incident surface 432 of the second lens 242 is equal to the curvature of the display surface 232 of the second display device 212. In this way, the light beam output by the second display device 212 can be ensured to be incident on the second lens 242 along the normal to the maximum extent, and the light beam output by the second display device 212 is prevented from being reflected and refracted when entering the second lens 242 to the maximum extent, which is further beneficial to improving the projection effect.

The curvature of the light incident surface 433 of the third lens 243 is equal to the curvature of the display surface 233 of the third display device 213. In this way, the light beam output by the third display device 213 can be ensured to be incident on the third lens 243 along the normal to the maximum extent, and the light beam output by the third display device 213 is prevented from being reflected and refracted when entering the third lens 243 to the maximum extent, which is further beneficial to improving the projection effect.

In the above embodiment, when the curvature of the display surface 231 of the first display device 211, the curvature of the display surface 232 of the second display device 212, and the curvature of the display surface 233 of the third display device 213 are equal to each other, the curvature of the light incident surface 431 of the first lens 241, the curvature of the light incident surface 432 of the second lens 242, and the curvature of the light incident surface 433 of the third lens 243 are also equal to each other in the present embodiment.

In an alternative embodiment, the light incident surface of the projection lens assembly may also be a plane, that is, the light incident surfaces of the first lens 241 to the third lens 243 are planes. Specifically, the light incident surface 431 of the first lens 241 is a plane, the light incident surface 432 of the second lens 242 is a plane, and the light incident surface 433 of the third lens 243 is a plane. Taking the light incident surface 431 of the first lens 241 as a plane, as shown in fig. 9.

It should be noted that, because the utility model discloses display device's display surface design is the curved surface (for example fig. 9 shows that display surface 231 of first display device 211 is the curved surface), and the camber of its camber matching projection screen's projection face, can improve the uniformity of projection imaging definition to a certain extent already, can be favorable to guaranteeing projection imaging's different parts clear of focusing simultaneously to a certain extent, and the income plain noodles of the above-mentioned projection lens subassembly of seeing is planar design, accords with equally the utility model discloses the design of embodiment.

Of course, in other embodiments of the present invention, the light incident surface of the projection lens assembly may be partially a curved surface and partially a plane. Specifically, the light incident surface of a part of the first lens 241 to the third lens 243 is a curved surface, and the light incident surface of the part of the lenses is a plane, which is not limited herein.

In an embodiment, the first display device 211 is located between a plane in which the first side 421 of the first lens 241 is located and a plane in which the second side 441 of the first lens 241 is located. In other words, the first display device 211 is located between an extension plane of the first side 421 of the first lens 241 and an extension plane of the second side 441 of the first lens 241. In this way, the light beams output by the first display device 211 can be incident on the first lens 241, which is further beneficial to improving the projection effect.

The second display device 212 is located between a plane in which the first side 422 of the second lens 242 is located and a plane in which the second side 442 of the second lens 242 is located. In other words, the second display device 212 is located between the extension plane of the first side 422 of the second lens 242 and the extension plane of the second side 442 of the second lens 242. In this way, the light beams output by the second display device 212 can be incident on the second lens 242, which is further beneficial to improving the projection effect.

The third display device 213 is located between a plane in which the first side 423 of the third lens 243 is located and a plane in which the second side 443 of the third lens 243 is located. In other words, the third display device 213 is located between an extended plane of the first side surface 423 of the third lens 243 and an extended plane of the second side surface 443 of the third lens 243. In this way, the light beams output by the third display device 213 can be incident on the third lens 243, which is further beneficial to improving the projection effect.

Please continue to refer to fig. 4. In one embodiment, the first display device 211 and the first lens 241 are spaced apart from each other, the second display device 212 and the second lens 242 are spaced apart from each other, and the third display device 213 and the third lens 243 are spaced apart from each other, forming an adjustable gap D. Therefore, the display device and the corresponding lens are arranged at intervals, so that the relative position between the display device and the lens can be adjusted more flexibly, the requirement of the design of the joint arrangement of the display device and the lens on the processing precision is avoided, and the assembly and the production process of the projection device can be facilitated. For example, the adjustable gap D may affect the design of a Back focal length (BFD) of the projection system, and the size of the adjustable gap D may be correspondingly adjusted according to the requirement of the product for the Back focal length, so that the Back focal length of the projection system meets the requirement.

Please continue to refer to fig. 2, fig. 4 and fig. 6. In an embodiment, the projection lens assembly further includes a light adjusting lens set 25, and the light beam integrated by the color combining lens set 24 enters the light adjusting lens set 25 and then exits through the light adjusting lens set 25. The first to third lenses 241 to 243 and the light control lens group 25 are sequentially disposed along the circumferential direction, and the light beams incident on the first to third lenses 241 to 243 are emitted from the light control lens group 25.

In one embodiment, the light modulating lens set 25 includes a curved mirror, which is convex toward the light beam propagation direction. Specifically, the dimming lens group 25 includes a fourth lens 251, and the fourth lens 251 is the arc mirror. The first lens 241, the second lens 242, the third lens 243, and the fourth lens 251 are sequentially disposed in the circumferential direction. The fourth lens 251 is similarly a prism, and the target edge 411 of the first lens 241, the target edge 412 of the second lens 242, the target edge 413 of the third lens 243, and the target edge 414 of the fourth lens 251 overlap.

In another embodiment, the fourth lens 251 may be a curved mirror with a sheet structure, and protrudes toward the light emitting direction, in this case, a light mixing space exists between the fourth lens 251 and the first to third lenses 241 to 243, and the light emitted from the first to third lenses 241 to 243 passes through the light mixing space and enters the fourth lens 251.

For example, by sequentially arranging the first side surface and the second side surface of the prism body along the circumferential direction, the second side surface 444 of the fourth lens 251 and the first side surface 421 of the first lens 241 are close to each other, and the first side surface 424 of the fourth lens 251 and the second side surface 443 of the third lens 243 are close to each other, as shown in fig. 4. The first lens 241, the second lens 242, the third lens 243, and the fourth lens 251 have the same height, and the top surfaces and the bottom surfaces of the first lens 241, the second lens 242, the third lens 243, and the fourth lens 251 are in the same plane, as shown in fig. 6.

The fourth lens 251 is located on a side of the first lens 241 and the third lens 243 facing away from the second lens 242, a first film layer 245 is disposed between the third lens 243 and the fourth lens 251, and a second film layer 246 is disposed between the first lens 241 and the fourth lens 251. The fourth lens 251 is used for integrating light beams output by the first display device 211, the second display device 212 and the third display device 213 and projecting the light beams to the projection lens assembly. That is, the light beams projected by the first display device 211 through the first lens 241, the light beams projected by the second display device 212 through the second lens 242, and the light beams projected by the third display device 213 through the third lens 243 are combined at the fourth lens 251, so that the light beams output by all of the first display device 211, the second display device 212, and the third display device 213 are integrated.

As shown in fig. 7, the light beam output from the first display device 211 is incident into the first lens 241, reflected by the first film layer 245, enters the fourth lens 251, and finally exits from the fourth lens 251. The light beam output from the second display device 212 is incident into the second lens 242, and directly passes through the first and second film layers 245 and 246, and then enters the fourth lens 251, and finally exits from the fourth lens 251. The light beam output from the third display device 213 is incident on the third lens 243, reflected by the second film layer 246, enters the fourth lens 251, and finally exits from the fourth lens 251.

The design of the back focal length of the projection apparatus 20 is performed by the fourth lens 251, and the material selection of the fourth lens 251 and the curvature of the light incident surface 434 of the fourth lens 251 all affect the overall back focal length of the projection apparatus 20. In this embodiment, the curvature of the light incident surface 434 of the fourth lens 251 may be different from those of the first lens 241, the second lens 242, and the third lens 243, and the curvature of the light incident surface 434 of the fourth lens 251 may match the design of the whole optical system of the projection apparatus 20, for example, the curvature of the light incident surface 434 of the fourth lens 251 matches the design of the focal length of the projection lens assembly, so that the light utilization rate of the whole optical system is higher, and the light efficiency is better. Other lenses may be added between the fourth lens 251 and the projection lens assembly to further improve the light utilization efficiency of the whole optical system and improve the light efficiency, which is not limited herein.

Of course, in other embodiments of the present invention, the curvature of the light incident surface 434 of the fourth lens 251 may be the same as that of the first lens 241, the second lens 242, and the third lens 243. Particularly, in the above embodiment, when the curvature of the light incident surface 431 of the first lens 241, the curvature of the light incident surface 432 of the second lens 242, and the curvature of the light incident surface 433 of the third lens 243 are equal, the cross sections of the first lens 241, the second lens 242, the third lens 243, and the fourth lens 251 along the height direction are all fan-shaped, and the first lens 241, the second lens 242, the third lens 243, and the fourth lens 251 form a complete cylinder. In addition, the projection lens assembly according to the embodiment of the present invention may not design the fourth lens 251, but only include the first lens 241, the second lens 242, and the third lens 243 described in the above embodiments.

In an alternative embodiment, please refer to fig. 10, which is different from the above embodiment in that the dimming lens group 25 of the present embodiment may be a plurality of dimming lenses, and the plurality of dimming lenses are sequentially arranged along the light beam propagation direction. Specifically, the plurality of dimming lenses includes a fifth lens 252 and a sixth lens 253, and the fifth lens 252 and the sixth lens 253 are sequentially disposed in the beam propagation direction.

The light beam output to the first lens 241 by the first display device 211 is transmitted to the fifth lens 252; the light beam output by the second display device 212 to the second lens 242 is transmitted to the fifth lens 252; the light beam output from the third display device 213 to the third lens 243 is transmitted to the fifth lens 252. The light beams transmitted to the fifth lens 252 by the first to third display devices 211 to 213 are integrated by the fifth lens 252, and the integrated light beams are transmitted to the sixth lens 253 and projected to the projection screen via the sixth lens 253.

In this way, the design of the fifth lens 252 and the sixth lens 253 can further improve the light utilization efficiency of the whole projection system and improve the light efficiency. Of course, the plurality of dimming lenses included in the dimming lens group 25 of the present embodiment is not limited to the fifth lens 252 and the sixth lens 253, and is not limited herein.

To sum up, the utility model provides a projection arrangement, its display device's display surface is the curved surface, and the clear image that display device passes through projection lens subassembly and throws promptly is the curved surface image. And when the projection surface of the projection screen is also a curved surface, the curvature of the display surface is matched with the curvature of the projection surface, so that the curvature of the clear image projected by the display device is matched with the curvature of the projection surface, and the clear image projected by the display device can be displayed on the projection surface as completely as possible. That is to say, the centre and the both sides of plane of projection can clearly focus simultaneously, and the centre and the both sides homoenergetic of the image of throwing on the plane of projection can clearly image, and the image of throwing on the plane of projection is comparatively clear and whole definition is comparatively unanimous promptly, can improve the projection effect, is favorable to improving user's impression.

Referring to fig. 11, fig. 11 is a schematic structural diagram of a projection lens assembly according to an embodiment of the present invention.

In an embodiment, the projection lens assembly is applied to the projection apparatus described in the above embodiments. The projection lens assembly comprises a color combination lens group 24 and a light modulation lens group 25, and light beams integrated by the color combination lens group 24 enter the light modulation lens group 25 and then exit through the light modulation lens group 25. The projection lens assembly has been described in detail in the above embodiments, and will not be described herein.

Referring to fig. 12, fig. 12 is a schematic structural diagram of another embodiment of a projection system of the present invention.

In one embodiment, the projection system includes a projection device 20 and a projection screen 30. Wherein the projection device 20 may be as described in the above embodiments. The projection screen 30 has a projection surface 31, and the light beam output from the display device 21 of the projection apparatus 20 is projected to the projection surface 31 through the projection lens assembly.

Furthermore, in the present invention, unless otherwise expressly specified or limited, the terms "connected," "stacked," and the like are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A projection device, comprising:

a display device having a display surface, the display surface being a curved surface, wherein a curvature of the display surface matches a curvature of a projection surface of a projection screen;

the light beam output by the display surface enters the projection lens assembly from the light incident surface and then is projected to the projection surface through the projection lens assembly.

2. The projection device of claim 1,

the display devices include first to third display devices that output images of different colors, respectively;

the projection lens assembly comprises a first lens and a third lens, the first lens and the third lens are sequentially arranged along the circumferential direction, the first lens and the third lens are provided with a light incident surface, and the light incident surface of the first lens and the third lens is respectively in one-to-one correspondence with the display surfaces of the first display device and the third display device.

3. The projection device of claim 2,

a first film layer is arranged between the first lens and the second lens and on the surface of the third lens, which is far away from the second lens, and the first film layer can reflect the light beams output by the first display device and can transmit the light beams output by the second display device and the third display device;

and a second film layer is arranged between the second lens and the third lens and on the surface of the first lens, which is far away from the second lens, and the second film layer can reflect the light beams output by the third display device and can transmit the light beams output by the first display device and the second display device.

4. The projection apparatus of claim 2, wherein the curvature of the display surface of the first display device, the curvature of the display surface of the second display device, and the curvature of the display surface of the third display device are equal.

5. The projection device of claim 2,

the light incident surface of the first lens is a curved surface protruding towards the first display device;

the light incident surface of the second lens is a curved surface protruding towards the second display device;

the light incident surface of the third lens is a curved surface protruding toward the third display device.

6. The projection device of claim 2,

the curvature of the light incident surface of the first lens is equal to that of the display surface of the first display device;

the curvature of the light incident surface of the second lens is equal to that of the display surface of the second display device;

the curvature of the light incident surface of the third lens is equal to the curvature of the display surface of the third display device.

7. The projection apparatus of claim 2, wherein the light incident surfaces of the first lens to the third lens are all planar.

8. The projection apparatus of claim 2, wherein the first display device and the first lens are spaced apart from each other, the second display device and the second lens are spaced apart from each other, and the third display device and the third lens are spaced apart from each other to form an adjustment gap.

9. The projection device of any of claims 2-8,

the projection lens assembly further comprises a dimming lens group, the first lens, the second lens, the third lens and the dimming lens group are sequentially arranged along the circumferential direction, and light beams incident to the first lens, the second lens and the third lens are emitted from the dimming lens group.

10. The projection apparatus according to claim 9, wherein the dimming lens set comprises a plurality of dimming lenses, the plurality of dimming lenses are sequentially arranged along the beam propagation direction, or the dimming lens set comprises a curved mirror, and the curved mirror protrudes towards the beam propagation direction.

11. A projection lens assembly, characterized in that the projection lens assembly comprises a projection apparatus according to any one of claims 1 to 10;

the projection lens assembly comprises a color combination lens group and a dimming lens group, and light beams integrated by the color combination lens group are incident to the dimming lens group and then are emitted out by the dimming lens group.

12. A projection system comprising a projection apparatus according to any one of claims 1 to 10 and a projection screen having a projection surface onto which a light beam output by a display device of the projection apparatus is projected by a projection lens assembly.